Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-473 Register 143970 used by US Marine Corps USMC. Built 1957. Aircraft history and location Aircraft History 143970 US Marine Corps 1957-02-25Sikorsky HUS-1 cn 58-473, ff:? del USMC as HUS-1, 143970, 25Feb57 redesig UH-34D, Oct 1962 Send Updates Use APP to upload photo @ (optional) When Now? / / Send